Double glazed window



Jan. 14, 1941. c. D. LOWRY DOUBLE GLAZED wnwow Filed lay 23,- 1938 2 Sheets-Sheet 1 Jammie: CLYDE D. Lowkv (Ittomeg reams-lea 14,194;

i UNITED. STATES PATENT .osrlcs novam GLAZED wmnow Clyde 1). Lowry, Toledo, Ohio, assignor to Libbey- Owens-F corporation of Ohio 111' Glass Company, Toledo, Ohio, a

Application May 23, 1938, Serial No. 209,491 2 Claims. (01. 189-64) two sheets or panes of glass spaced from one' another and sealed around the edges thereof to provide a dead air space therebetween, has long been desirable wherever it is important to reduce heat transfer and to prevent condensation of moisture upon glass in glazed openings. Thus, double glazed windows have the eflect of greatly retarding the escape of heat therethrough from the inside of a building during the winter as well as minimizing the passage of heat into the building from the outside during the summer. This is due to the fact that the air-tight space between the glass sheets is an.,exceedingly poor conductor of heat so that a double glazed window possesses much greater. insulating properties than a single sheet or pane of glass. Also, the use of double glazed windows is particularly advanta'geous in air conditioned structures.

According to the 'invention, thereis provided a double glazed window construction including inner and outer sashes in which are mounted sheets or panes of glass, said sashes being associated with one anotherin anovel manner to effectively seal the space therebetween, while at 0 the same time permitting separation of the sashes to allow for easy cleaning of the inner surfaces of the two sheets or panes of glass.

Another feature of the invention is the provision of a double window construction wherein the sheets or. panes of glass are mounted in it manner that they are rendered absolutely tight without the use of putty or mastic of any kind.

A further feature of the invention is the provision of a double window of relatively simple, yet strong, sturdy, and durable construction, which can be easily and conveniently assembled and mounted'in the window frame and embodying means'for applying a yielding, cushioned pressure to the sheets or panes of glass to minimize breakage thereof.

A still further feature of the invention is the provision of a double window of the above char-- acter, embodying inner and outer sashes so constructed as to accommodate glass'sheets or panes, of different thicknesses and also of such con struction that either one of the sheets or panes of glass can be readily removed from the window without necessitating the removal of the other sheet or paneor disturbing its mounting. 7

tion will become more apparent during the course of the following description, when taken in'connection with the accompanyingdrawings.

'In the drawings, wherein like numerals are employed to designate like parts throughout the 5 same: Y Y

Fig. 1 is a face view of a double window constructed in accordance with the invention; Fig. 2 is a vertical section through the bottom of the double window taken substantially on line 10 2-2 of Fig. 1; and Fig. 3 is a perspective sectional view showing a slightly modified construction.

In the embodiment ofthe invention illustrated in Figs. 1 and 2, the improved double window is 1'5 designated in its entiretyby the numeral 5 and 'is shown as being mounted in a substantially I rectangular window frame consisting of a horizontal sill 8, horizontal head ian b I, and oppo- ,site vertical side lambs l and 8.

The double window 5 comprises an outer metallic sash I0 and an inner metallic sash within which are mounted the sheets or panes of glass II and i3 respectively. The outer sash iii is of a shape corresponding to the shape of the'win- 25 dow frame and is adapted to fit snugly therein, while the inner sash II is preferably 'hingedly carried by said outer sash so that it is movable relative thereto as will be more fully hereinafter described. When glazing a'rectangular window franie, the outer sash lllis likewise rectangular and comprises 'a bottom section ll, top section IS, and vertical side sections it and I! disposed opposite the sill I, head lamb I and side lambs 8 and 9 respectively, being mitered at their adJacent ends as indicated at id. The several sections it to ll of the outer sash III are of substantially the same construction and therefore the bottom section it only will be described in detail although it will be under-- 40 stood that this construction is duplicated at v the top and sides of thewindow. The-bottom .section It comprises a horizontal base or cover .plate 19 resti'ng'fupon thereto by wood screws ill; the forward end of 45 the sill 8 and fastened said cover plate being provided with a downturned flange 2| overlapping the inner edge of the sill to give the desired ornamental appear- 1 ance.

'- Formed integral with the outerend of the horias Other obi'ec,ts' and 'advantagesof the inven zontalfledge n is a-ivertical nam provided M The cover plate I! is provided at its .end 50 at its upper end with a bead adapted to engage the outer face of the glass sheet l2. Arranged beneath the horizontal ledge 23 and supported upon the sill 3 is an' inverted channel bar 25 secured to said sill by wood screws 21, while 3 the ledge 23 is secured to said channel bar 26 by machine screws 28.

The means for clamping the glass sheet l2 against the outer member 24 includes a substantially L-shaped clamping member 29 having a substantially horizontal base 30 and a substantially vertical flange 3! provided at its upper end with a head 32 adapted to engage the inner face of the glass sheet l2 preferably directly opposite head 25. The upper surface of the horizontal ledge 23 is provided with a series of longitudinally extending teeth 33 which incline rearwardly toward the glass sheet 12 while the under surface of the horizontal base 30 of clamping member 29 is formed with a beveled rib 34 adapted to engage the teeth 33 and to fulcrum thereon. The clamping member 23 is secured to the ledge 23 by the desired number of screws,

35 which pass through slots 36 in the base 30 of said clamping member.

When securing the glass sheet I2 in place, the said sheet is first moved into engagement with the outer member 24 and the clamping member 29 is then moved inwardly against the glass sheet and the rib 34 thereof engaged between two of the teeth 33. The screws 35 are then tightened and when this is done the'clamping member 29 will be rocked upon its fulcrum 34 to cause the desired clamping pressure to be exerted upon the glass sheet. The provision of the teeth 33 and slots 36 through which the fastening'screws 35 pass, permit the use of glass sheets of different thicknesses. In order to obtain a yielding, cushioned pressure against the glass sheet l2, the outer and inner members 24 and 3| are adapted to carry resilient, compressible cushioning strips 31 and 33 preferably of rubber, rubber composition or the like which engage the outer and inner faces respectively of the said sheet. These cushioning strips 31 and 33 serve not only to hold the glass sheet absolutely tight in the sash but further act to mini-v mize breakage of the glass.

The inner sash H is carried by the outer sash l0 and the cover plates 19 of the outer sash sections l4 to [1 define a so-oalled sub-frame within which the said inner sash is received. Thus.

the inner sash II also comprises a bottom section 39, top section 40, and vertical side sections 4| and 42 disposed opposite and contacting the cover plates I9 of the bottom, top, and side sections l4, I5, I13, and I1 respectively of the outer sash I 0.

Each section 39 to 42 ofthe inner sash comprises a front or outer member 43 and a rear or inner member 44, said front member being in the form of a longitudinally extending bar provided with a laterally directed flange 45 formed at its inner end with a head 46 adapted to engage the outer face of the glass sheet 53. The rear member 44 .consists of a substantially flat plate provided at its inner end with a bead 41 adapted'to engage the inner face of the glass sheet I 3 opposite bead 46. Formed upon the inner surface of the rear member 44. adjacent its outer end, is a beveled rib 48 seated in a groove 49 in the rear face of the front member 43 and constituting a fulcrum upon which the said rear,

member is adapted to rock. The rear member 44 is secured to the front member 43 by screws or the like 53 and upon tightening of these screws,

the said rear member will be rocked upon its fulcrum 43 to move the inner end 41 thereof toward the glass 'sheet. The inner face 5| of the front member 43 is beveled as shown to perm'it sufllcient rocking movement of the rear member 44 'to accommodate glass sheets of different thicknesses.

The flanges 45 of the front members 43 and the rear members 44 of the inner sash sections are also provided with yieldable cushioning strips 52 and 53 respectively of rubber, rubber composition or the'like which are adapted to exert a cushioned clamping pressure against the glass sheet i3 upon tightening of the screws whereby to firmly secure the glam sheet in place in the sash as well as minimize danger of breakage of the glass.

The inner sash II is adapted to be pivotally carried by the outer sash l0 so that the said inner sash can be ,Opened and closed independently of the outer sash. To this end, the inner sash may be hinged to the outer sash by one or more hinges 54 of any suitable type and these hinges may be provided either at the top, bottom, or side of the sash, as may be found most desirable. In this manner, the inner sash can be readily opened to permit cleaning of the inner surfaces of the two sheets of glass [2 and I3 and likewise to. permit the replacement of either sheet should it become broken. When the inner sash II is in closed position, as shown in Fig. 2, it is com'pletelyreceived within the sub-frame formed by the cover plates IQ of the outer sash sections I 4 to l1. The inner sash can be secured in closed position by any desired means such as a catch 55. I

The vertical webs 22 of the outer sash sections are provided in their front faces with compressiblecushioning strips 53 of rubber, rubber composition or the like which ab ut the inner faces of the rear members 44 of the inner sash sections when the said inner sash is closed, whereby to effectively seal the space between the two sheets of glass to render it substantially airtight. As pointed out above, the advantages to be gained by the use of double glazed windows over single windows are well known in the art: their use being of value wherever it is important to reduce heat transfer and to prevent condensation of moisture upon glass in glazed openings.

The above construction not only permits the glass sheets l2 and I! to be easily and conveniently separated for cleaning but also for replacing either or both of the glass sheets in caseof breakage. The metal sections used in the construction of the double window are preferably though not necessarily of extruded aluminum alloy, while the cushioning strips are preferably of extruded rubber. The use ofextruded rubber stripping, as shown, renders the window absolutely tight without the use of putty or mastic of any kind and these. rubber strips being under constant pressure would have an exceptionally long life. The double window construction herein pro.- vided can also be fabricated at the factory into standard size complete units for quick and simple wardly beyond the glass,

sill plate Eli comprises, an inclined body portion 59 arranged above the sill i8 and provided at its outer end with a downturned flange 50' which overlaps the outer edge of the sill to givethe desired ornamental effect. The body portion 59 of the sill plate is formed at its inner end with a substantially horizontal supporting portion 8| terminating in a downturned flange 62, said horizontal supporting portion 6| being received beneath the horizontal ledge 23 of the outer sash I0 and secured to the sill 6 by wood screws 63.

In assembling the construction-above described, the outer sill plate 51 is first installed by moving it inwardly until the flange 60 thereof engages the outer edge of sill 58, with the inner end 52 thereof restingupon sill 6. v The screws 63 are then threaded into the sill 6 to rigidly secure the sill plate in position. The outer and inner sashes l0 and H can then be installed from the inside of-the window frame and after the outer sash i0 is located in proper position it can be secured to the 'horizontalsupporting portion 6| of sill plate 51 by suitable fastening means, such as the machine screws 28 shown in Fig. 2.

The construction and arrangement of the outer sashin isconsidered to be new and novel apart from its relation to and association with the inner sash II and can be used by itself, :vith very little modification, for single glaz- It is to be understood that the form of the invention herewith shown and described is to be taken as the preferred embodiment of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

I claim; 7 1.1n a window construction, a metal sash adapted to be mounted in a window frame and comprising outer and inner members for clamping a pane of glass therebetween, said-outer mernher having a substantially vertical portion engaging the outer face of the pane of glass and a substantially horizontal portion extending ingaging the inner an inwardly directed substantially horizontal said inner member also having a substantially vertical portion engaging the inner face of the pane of glass and an inwardly directed substantiallyhorizontal portion disposed above the horizontal portion of said outer member, the horizontal portion of said outer member being provided upon its upper surface with a plurality of teeth extending longitudinally thereof, while the horizontal portion of'said inner member is provided upon its bottom surface with a beveled rib engaging said teeth, and means for connecting the horizontal, portions of said outer and inner members together and for rocking the said inner member upon the said teeth.

2. In a window construction, a metal sash adapted to be mounted in a window, frame and comprising outer and inner members for clamping a pane of glass therebetween, said outer memberhaving a substantially vertical portion provided with a, bead engaging the outer face of the pane of glass and a substantially horizontal portion extending glass, said inner member also having a substantially vertical portion provided with a bead enface of the pane of glass and portion disposed above the horizontal portion of said outer member, the horizontal portion of said outer member being provided upon its upper surface with a plurality of teeth extending longitudinally thereof, while the horizontal portion of said inner member is provided upon its bottom inwardly beyond the w surface with a beveled rib engaging said teeth,

screws passing loosely through the horizontal portion of said inner member and threaded in the horizontal portion of said outer mem-- bet for connecting the said outerand inner members together and for rocking said inner member upon said teeth, and compressible means carried by the vertical portions of said inner and outer members outwardly of said glass engaging beads for exerting a yielding, cushioned pressure upon the glass.

' CLYDE D. LOWRY. 

